Lukaku believes he has made huge strides in terms of his mentality in recent seasons, culminating in a stellar campaign under Antonio Conte this year at Inter.
“I thought it was now or never for me when I turned 27,” the striker revealed.
“You can score 500 goals in your career but if you don’t win a title then it’s all pointless.
“I’ve improved with my back to goal thanks to a machine we use in training which fires balls at me at 30-40km/h, I have to direct them towards my teammates.
“Beforehand I was always a bit behind the defender marking me, now I’m two seconds ahead of them.
“It’ll never be my favourite kind of work but now I’m fulfulling a crucial role, a bit like Shaquille O’Neal in basketball.